Historical map of Memelland and the northern part of East Prussia.
Historical flag of the Memelland from 1919 to 1924 and de facto until 1939.
Postage stamps of the Klaipėda Region in use 1920-1925. The upper stamp is French with overprint in German "MEMEL". The other stamps are Lithuanian, one with overprint in Lithuanian and in German, the other without. The latter one was issued especially for postal use in the Klaipėda Region.
The Klaipėda Region (Lithuanian: Klaipėdos kraštas) or Memel Territory (German: Memelland or Memelgebiet) was defined by the Treaty of Versailles in 1920 and refers to the most northern part of the German province of East Prussia, when as Memelland it was put under the administration of the Council of Ambassadors. The Memel Territory, together with the other parts severed from Germany, the Saar and Danzig, was to remain under the control of the League of Nations until a future day when the people of these regions would be allowed to vote on whether the land would return to Germany or not.
Following World War I, the Klaipėda Region was created as a roughly triangular wedge, with the northern border being the Treaty of Melno border, the southern border being the Neman River, and on the west abutting the Baltic Sea. In 1923, fearing that the western powers would create a free state, Lithuanians took control of the region and, as part of larger regional negotiations, the region was incorporated into Lithuania. In 1939, Lithuania acquiesced to Nazi demands and transferred the Klaipėda Region to Germany. At the end of World War II, the Soviet Union incorporated the region into the Lithuanian SSR. The area of the Klaipėda Region is now part of the Republic of Lithuania, contained within Klaipėda and Tauragė counties. The border established by the Treaty of Versailles remains in effect as the current international boundary between Lithuania and the Kaliningrad Oblast of Russia.